Engraving machine



Sept. 14, 1948. A. 1.; WOODY 2,449,097

ENGRAVING MACHINE Filed Feb. 21, 1944 2 Sheets-Sheet 1 MIRROR Sept. 14, 1948. A. L. WOODY 2,449,097

ENGRAVING MACHINE Filed Feb. 21, 1944 V2 Sheets-Sheet 2 A? 3 2 5 ZQ 1 9 5 m jzga" 30o MHOL ILOQAOIHO l, QVHVAHQVII-l '1 JnueOr 2 wwim Patented Sept. 14, 1948 UNITED STATES. PATENT OFFICE ENGBAVING MACHINE Albert L. Woody, ltlomewood, Ill. Application February 21, 1944, Serial No. 523,293

This invention relates to engraving machines particularly of the pantograph type such as used for reproducing lettering, designs, images or the like, from suitable copy or patterns. One of the particular features of the invention is the provision of means whereby the reproduction may be a reversal of the pattern or copy. The conventional pantograph engraving machine such as has long been in use, reproduces at the cutter point, the motions of the stylus or tracing point as it passes around or over the master pattern. Such reproduction may be of full size orany reduction of the master pattern or copy, and in practice, reproduction is usually reduced approximately two to twelve times. Ordinarily, the reproduction will also follow the lines of the copy so that in case of lettering. the reading matter will appear the same as the copy. However, it is often desirable to have the reading matter reversed as, for instance, when the reproduction is. to be read through a transparent plate or perhaps read by means of a mirror.

In accordance with the present practice when such a reversed reproduction is required, such as a line of reversed lettering cut in a sheet, die or 7 Claims. (Cl. Bil-13.1)

mold, it is the practice to use reversed master production from the conventional or usual letters or copy.

Furthermore, in accordance with the present invention, I provide means for reversing'a threedimensional figure or image such as a die, mold or medallion from an original pattern, thus avoiding the necessity of providing a'reversed threedimensional master pattern for the same.

Another object is to provide an improved method and apparatus which permits such reversals in the reproductions to be obtained'from standard or special copy and master patterns which may be used on conventional pantograph engraving machines, preferably without any change in such machines and without requiring any new technique by the operator. My improved reversing device may be incorporated in the regular pantograph engraving machine or may constitute an attachment to be applied to such machines.

Other objects and advantages will also be fully described hereinafter.

In the accompanying drawings illustrating my invention, I

Fig. l is a front view of a more or less conventional or standard pantograph engraving machine provided in my improved reversing device;

Fig. 2 is a plan view of the same with parts omitted or broken away for convenience in illustration; I

Fig. 3 is an enlarged side view showing the main copyholder with my improvedauxiliary copyholder attached thereto;

Fi 4 is a front detail View of the parts shown in Fig. 3;

Fig. 5 is a side view of the copyholder as seen in Fig. 1 with the auxiliary copyholder in raised position;

Fig. 6 is a view showing how the copy, as it appears in Fig. 5, will be reproduced by the pantograph machine;

' Fig. 7 is a view similar to Fig. 4 showing a modified form of construction; and v Fig. 8 is a somewhat similar view showing the use of the reversing copyholder on a three-dimensional pantograph machine for making reproductions of irregular surfaces, designs or the like.

As shown in these drawings, [0 representsany ordinary or preferred form of pantograph engraving machine having a main copyholder H, tracing arm I 2, with holder 13 for the tracing stylus 14. The machine is provided with the usual adjustable table 15 on which is mounted the plate or part l6 which is to be cut or engraved. The cutter point or engraving tool I! is carried on a head or spindle iii in the usual manner and may be driven by any suitable means. The engraving machine as thus commonly constructed is adapted to reproduce copy carried on the copyholder H but without reversal of the same.

In accordance with the present invention, I provide means ,for reversing the copy when reproduced, for the purposes above set forth. In order to do this, I provide an auxiliary copy holder to which is positioned above the stylus or tracer point I l and which may be held in substantial parallelism with the copy holder II by any suitable means. As shown in Figs. 1 to 5, I provide a bracket 2!! which is secured to the main copy holder or other fixed part of the machine by means of screws 2|. This bracket has upwardly extending arms 22 with hearings or pintle members 23 which coact with the similar members 24 on the auxiliary copy more holder [9 to provide slip hinges that will permit the copy holder to be swung substantially 180. Clamping screws 25 are provided for holding the auxiliary copy holder in adjusted positions. This holder is preferably provided with the usual grooves 26 for receiving the copy letters 21 as shown in Figs. 4 and 5, such letters being held against longitudinal movement by copy clamps 28 in the usual manner. When the copy letters are to be inserted in the auxiliary copy holder l9, it may be swung over through 180 so that the grooves face upwardly and the letters may be readily inserted in the usual manner. shows the auxiliary copy holder in raised or vertical position with a set-up of lettering which is to be reversed. The stylus i4 is reversed in the holder l3 so that it projects upwardly in suitable position to coact with the copy letters 21.

In order that the operation may be readily seen by the operator, I provide a mirror 29 which is conveniently placed on the upper surface of the main copyholder so that it reflects the copy held in the auxiliary copyholder and shows the stylus in position for tracing such letters. 'I have found that by means of this mirror, the image produced therein is substantially the same as viewing the stylus when used with the main copyholder so that the tracing of the letters and reproduction may be easily carried out without any special or additional training. It will, of course, be understood that the engraving machine is adjusted so that the tracing of the letters in the auxiliary holder will cause the cutter I? to coact with the plate to be cut for engraving the letters or copy in the usual manner. With the copy set up in the auxiliary holder I 9, as shown in Fig. 5, the reproduction will be the same as shown in Fig. 6 which shows the desired reversing of the lettering or copy. Such reproduction, of course, may also be of full size or reduced in the usual manner by means of this arrangement. It will be seen that standard copy letters may be used to provide the reversed work or engraving which will avoid the necessity of providing special reversed copy letters for such purposes.

Fig. 7 shows a removable reversing copyholder to clamp on any engraving machine. In this arrangement, the bracket 30 is fastened to the copyholder I] by means of set screws or clampin members 3] and carries an auxiliary copyholder 32 which is secured thereto by means of screws 33. In this instance, I also show a master-plate 34 which is cut with any desired copy and which is held on the lower face of the copyholder by means of clamps 35. The operation when using such master-plate is, of course, substantially the same as when. using the copy letters.

Fig. 8 shows a modification whereby the invention may be used for reproducing three-dimensional objects or copy. In this arrangement, the pattern 36 is supported in inverted position as by attaching the same to the auxiliary copyholder and the stylus l4 coacts therewith in the usual manner, but the reproduction will be a reversal of the pattern or copy. In other words, the high points on the pattern will appear as depressions and vice versa, while right and left points will appear reversed as in a mirror in the. reproduction. With this modification, I also prefer to position the mirror or reflecting surface 37 adjacent to and at one side of the stylus as by attaching it to the bracket by means of an arm 38 as shown.

While I have shown preferred forms of my invention and different means for utilizing the same, it will be apparent that changes may be made in the details of construction or in the arrangement of the parts to adapt the same for difierent machines or for special uses without departing from the scope of the invention, and therefore I do not wish to be limited to the particular constructions shown except as set forth in the following claims.

I claim:

1. The combination with a pantograph engraving machine having the usual copyholder with a tracer point mounted above the copyholder and means for transmitting movement from the tracer point to the cutting tool, of a bracket secured to the copyholder, an auxiliary copyholder carried by said bracket and extending out over the tracer point with its face opposed to the face of the first-named copyholder and serving to hold copy facing downwardly to 'coact with the upwardly extending tracer point, and a reflecting surface positioned below the tracer point for observing the action of the tracer point with respect to the 2. Areversing attachment for a pantograph engraving machine, comprising a bracket adapted to be secured to the machine and having arms extending upwardly above the copyholder, a mirror supported by said copyholder, an auxiliary copyholder p-ivotally mounted on said arms whereby it may be swung through substantially and means for fastening the auxiliary copyholder in adjusted positions, one of said positions facing downwardly above the first named copyholder, whereby the stylus may be reversed to extend upwardly and coact with copy held in the auxiliary copyholder.

3. The combination with a pantograph engraving machine having a copyholder, of a bracket, means for detachably securing the bracket to the copyholder, a second copyholder carried by the bracket above the first named copyholder and substantially parallel thereto, a master-pattern, clamps for securing the master-pattern to the second named copyholder, and a reflecting surface carried by the first named copyholder.

4. The combination with a pantograph engraving machine having a copy holding plate, of a bracket secured to said plate, a copy holding plate carri'edby said bracket and extending out over the first named plate, means for securing a pattern or copy to the lower face of the second named plate, and a mirror carried by the bracket in position to reflect the pattern, substantially as described.

5. The combination with a pantograph engraving machine having the usual copyholder with a manually operable reversible tracer point mounted in the tracing arm above the copyholder and having a cutting tool, and means for transmitting movement from I the tracer point to the cutting tool, of an auxiliary copyholder, means for supporting said auxiliary copyholder above the tracer point with its face opposed to the face of the first named copyholder and serving to hold copy .faclng downwardly, to coact with the tracer point when said point is positioned to extend upwardly.

6. A reversing attachment for a pantograph engraving machine having the usual copyholder and horizontally movable tracing arm with a manually operated reversible stylus carried thereby, comprising a bracket adapted to be secured to the machine and having arms extending upwardly above the copyholder, an auxiliary copyholder pivotally mounted on said arms and means for fastening the auxiliary copyholder in adjusted positions, in one of which positions it will face downwardly above the first named copyholder whereby the stylus may be reversed to extend upwardly and coact with the copy held in the auxiliary copyholder.

'7. The combination with a conventional power operated pantograph engraving machine having a. copyholder, of a bracket secured to the copyholder, a pattern or copyholder carried by said bracket and extending out over the first named copyholder, and means for securing a pattern or copy to the lower face of the second named copyholder.

ALBERT L. WOODY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 415,450 Eberhardt Nov. 19, 1889 429,213 Jacobson June 3, 1890 486,210 Hope Nov. 15, 1892 542,902 Taylor July 16, 1895 571,566 Jahnsen Nov. 17, 1896 711,995 Brady Oct. 14, 1902 1,617,312 Braren Feb. 8, 1927 15 2,303,956 Rossbacher Dec. 1, 1942 

